ITEM 2.1 attachmentSubmitted to;
ENGINEERING REVIEW
Residential Subdivision
for the City of Otsego
by
Hakanson Anderson
Honorable le Mayor and City Council
Review No.l
cc: Lori Johnson, Administrator
'ami Lof, , City Clerk
Dari Licht, City Planner
Andy MacArthur, City Attorney
Worn E kritges, K Hovnanian Horner of Minnesota, , LLC
Francis D. Hagen 11, '.E., Westwood Professional Set -vices
Reviewed .
Ronald J. Wagner, P.E.
Brent M. Larson, P.E.
Date,
December 11, 2013
Proposed
Development:
Pleasant Creek arms �� Addition
Street Location
A positron ofthe NW Y of 825, T1215 R24, north of 77th Street,
of Property,
cast of LaBeaux Avenue NE.
Applicant.
Torn Bak-ritges
Developer:
K Hovnanian Homes of Minnesota, LLC
12701 Whitewater Drive, Suite 12
Minnetonka, etonka, 11 N 55343
Owners of Record: Lafayette Partners, LLC
Purpose: Pleasant Creek Farms 5 1h Addition is a proposed 18.4± acre, 47 lot
single-family residential development in the City of Otsego,
Wright County, Minnesota. The proposed development will be
served with municipal water, sanitary sewer, storm sewer, and
public streets typical of an urban setting.
Jurisdictional tional enI : City of Otsego, Wright County, Minnesota Depailment of
(bitt not limited o Health, Minnesota Department ofNaturalResources, Minnesota
Pollution Control Agency, Wright Soil and Water Conservation
District.
Permits Required: NP ES, Minnesota Department ofHealth (water), and
(bunt not limited to) Minnesota Pollution Control Agency (sanitary sewer)
TABLE OF CONTENTS
INFORMATION A AIL.ABLE
EXISTING CONDITIONS
PRELIMINARY PLAT
SUBDIVISION C I PIG RATI N, LOT SIZE, DENSITY
STREET/TRAFFIC/ACCESS ISSUE
PRELIMfNI Y GRADING PLAN
PRELIMINARY UTILITY PLAN
SANITARY SEWER SYSTEM
WATER SYSTEM
SURFACE NATER MANAGEMENT/STORM SEWER SYSTEM
PRELIMINARY AI STREET PLAN/PROFILE
WETLANDS
ENVIRONMENTAL
SUMMARY AND/OR RECOMMENDATION
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INFORMATION AVAILABLE
Preliminary Plat Submittal, 1 /I 1 3, by Westwood Profes sional Services, line.
Preliminary Storm a er Calculation for Pleasant Creek Farms 5th Addition, 11/21/13, by
Westwood Professional Services, Inc.
Previous Pleasant Creek Farms Additions' Information
Final Plat of Pleasant Creek Farms 4th Addition, filed 5/4/05, by Westwood Professional
Services, Ino .
Preliminary Plat of Pleasant Creek Farms, 3/18/03, by McCombs Frank Roos Associates, Inc.
Grading, Drainage and Erosion Control Flan for Pleasant Creek Farms, 10/30103 revision, by
McCombs Frank Roos Associates, Inc,
Additional Information
Minnesota esot Mules, Chapter 4410 — EAW Re quireinent
City of Otsego Engineering Manual
City of Otsego Zoning and Subdivision Ordinances
National Wetland Inventory Map
PAGE 3
EXISTING CONDITIONS
1, Section corners and section lines shall be clearly depicted and labeled on the plan, (21-6-
2.A.2.)
2. Boundary lines to include bearings, distances, curve data, shall be clearly indicated in the
plans, (21-6-23j)
3. Existing zoning classifications for land in and abutting the subdivision shall be shown on
the plan, 21--2..2t
4. Location, size, and elevations of existing storm sewer and culverts, or any other
underground facility within 150 feet of the proposed plat, shall be shown on the plat.
21-6-2.13.5.)
5, Adjoining unsubdivided and subdivided, within 150 feet of the plat, shall be identified b
name and ownership, include all contiguous land owned or controlled by the applicant.
(21-6-23.6)
. The normal water and 10 O - yr high water elevations are needed for all ponds/wetlands
within 150' of the boundaries (21-6-2.B.9),.
7. The existing contours shall have elevation labels.
8. Include the proposed HWL elevations for existing ponds,
North Pond (Pond 23W)
South Pond (Pond 23E)
NWL=94.0
NWL=941.5
2yr# HWL = 948.95
2yr HWL = 942.6
10 yr HWL = 950.10
10 yr HWL = 943.2
100 Yr HWL = 951.51
100 Yr HWL = 944.0
PR LI INARY TAT
SUBDIVISION CONFIGURATION, LOT SIZE, DENSITY
1
All proposed lot sizes, widths, and depths appear to meet the minimums for existing and
proposed R-6 zoning. (20-67-6.A
STRE TlTRAFFIC/ACCESS ISSUI+�
I . Street 1 shall be named Lambert Circle NE.
2. Include centerline horizontal curve data on plan.
PRELIMINARY GRADING PLAN
1 , The soil boring locations shall be shown on the plant (21-6-2.B.8.
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PRELIMINARY UTILITY PLAN
SANITARY SEWER SYSTEM
1. Label the size of existing downstream sanitary sewer along Lachman Avenue and at 77'
Street intersection.
2, The sanitary sewer shall be stubbed to the property lite at the cul-de-sac.
WATER DISTRIBUTION SYSTEM
Label the size of existing downstream watermain along Lachman Avenue and at the 77"'
Street intersection.
2. All water#main shall be Ductile Iron Pip (DIP) Class 52. The type and sizes of
water#ra in pipe are mislabeled, The 12" watermain shall extent north along Lachman
Avenue and then west to the proper .y line. The 10" watermain shall extend north along
Lambert Avenue to the intersection of Lachman and Lambem.
3. Hydrant coverage is insufficient for Dots I 1 & t2, and 19 & 20, Bleck 1. A maximum
Soo' spacing 2 5 o' rad iusis allowed. The entire building pact are a must be encompased
by this radius.
SURIFACE WATER M NAEMENUSTORM SEWER SYSTEM
1. Label the size and invert elevations of the existing downstream storm sewer along
Lachman Avenue and at the 77t" Street intersection.
2. The skimmer structure shall be one of the approved City of Otsego Standard skimmer
structures.
es.
Stormwater management calculations dated 11/21/13 have been submitted for review.
Pleasant Creek 'arms 5 tri Addition calculations revise the previously proposed multi-
family area to single family. The new calculation attempt to use the existing stormwater
design already graded and in place with the previous additions including till l
portion of existing downstream stogy#ern sewer and pond(s), Since the original design
submittal, new MPGA. NP ES requirements have been established and must be met,
These neve NP ES permit requirements supersede the City requirements that are not a
strict until the City has adopted a M84 program. With this consideration we offer the
following comments:
a. The NPI ES permit requires that the water quality volume WQV I inch of runoff
from newly created impervious areas) shall be retained on site. The storm pater
calculations state that the site contains "D" type soils (clay) per the Geotechnical
Report dated 5/22/03 by Braun Intertec and therefore infiltration is not possible.
Per the I P ES permit when infiltration is prohibited other volume reducing
measures mut be considered and the water quality lu me may be treated by
filtration, wet sedimentation basin or other method,
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i. Provide additional supporting documentation that the soils are type "U,
since not all clays are considered type L soils,
ii. Provide in Writing ghat other volute reducing measures have been taken.
iii. Also, the presence of type D soil in one part or every the majority of the
site does not mean the entire site cannot utilize infiltration.
. Verify the volume of each pond meets the 1 PL S permits the minimum of 1,800
cuft per acre draining to it,
o. Based on the Type D sail determination, the design meets all NPDES
requirements for using Nvet sedimentation basins as treatment.
d, If the onsite soils are anything other{ than Type D soils as may be the case in the
area of Pond the water duality volume shall be retained on site(i.e. infiltrated).
PRELIMINARY STREET PLAN/PROFILE
1, The proposed street section inects. or; exceeds the typical section used for the pre ious
additions of Pleasant Creep Farms.
WETLANDS
No Loss - Notice of Decision was approved 10/7/13 per; the Minnesota Wedand
Conservation Act,
ENVIRONMENTAL
A written of environmental certification is required from the previous land owner, (21-6-
2.B. 1
21- -2.2.1 1
MISCELLANEOUS
1. All new developments will require postmaster approved looping cluster mailboxes to b
installed. The location of these mailboxes es shall be shown in the final construction plans
for review by the City and Postmaster.
2. We recommend when the developer receives bids for the project it may be prudent to call
to the contractor's attention the City of tsego's requirement for a new type of sanitary
sewer casting and lid system when building in clay type soils. The new requirements are
in the Otsego Engineering Manual, 2013 revision and can be found online.
SUMMARY AND/OR RECOMMENDATION
We recommend approval contingent upon the above comment being addressed.
'AGE 6